Microsoft issues hotfix for WMP MPEG4 video color smearing problem

Microsoft released a patch for people who experience color smearing or a bleeding effect when playing MPEG4 video files in Windows Media Player 9 or 10.

In Microsoft Windows Media Player 9 or 10, you may experience a color smearing or bleeding effect when you play some MPEG4 videos. This behavior often occurs when the video contains fast-moving scenes of varying colors.

This problem occurs because of an issue with the way that the MPEG4 codec handles motion vectors. Sometimes, the decoder mistakenly uses invalid motion vectors.
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